New in 0.10.0Themes

A desktop app for every
coding agent you use.

Run Claude Code, Codex, OpenCode and six others from one window. Any thread can hold more than one model, and the app is free and open source.

Download ThreadlinesView on GitHub

Use the accounts you already have · Runs locally

Runs the agents you already use

A 46-second demo: Opus can't find why some customers are charged twice, so you add GPT-6.1-Sol to the thread. A recreated conversation in the current app.

How it works

Get help without losing the thread

When an agent gets stuck, add another model, split the work into new threads, or send part of it to another computer. Every answer comes back to the thread you started in.

  1. Double charges at checkoutMacBook Pro
  2. Opus 5.5Double clicks are blocked and the tests pass. I can't reproduce it.
  3. You add GPT-6.1-Sol to the threadRooms
  4. GPT-6.1-SolThe payment goes through, but its reply times out, and the retry charges again.
  5. Opus starts a threadThreads
    Sonnet 5.5Last week's logs show 41 double charges, each one right after a timeout.
    The answer comes back
  6. Opus starts a thread on Windows PCFleet
    Opus 5.5Every checkout test passes in Edge with the fix.
    The answer comes back
  7. Opus 5.5Fixed. The retry reuses the first payment's key, so it can't charge twice.
An example thread. By default, an agent asks you before it starts a thread.
Rooms

Add a second model to the thread. It catches up on the conversation, and the two can ask each other questions.

Threads

An agent can hand part of the job to a new thread, on the model it picks, and keep working until the answer arrives.

Fleet

Link your Mac, Windows PC or Linux box. An agent on one can start a thread on another, and Fleet shows what each is running.

Built in

Everything else, beside the chat

  • Pull requests and CI

    Open the pull request beside its thread. Checks show above the message box, and you can merge once they pass.

  • Built-in browser

    Run your site in a panel next to the chat, so you and the agent look at the same page.

  • Git changes and history

    See what each turn changed, stage and commit it, and read the history without leaving the thread.

  • Files and context

    Select lines in a file, the terminal or a reply, and attach them to your next message.

  • Scheduled and event tasks

    Run a prompt every weekday at 9, or whenever an issue on GitHub gets a label.

  • Switch agents mid-thread

    Move a thread from Claude to Codex and keep the conversation and your changes.

See what changed in every release

Free and open source

Your machine, your accounts

Threadlines runs on your computer and uses the Claude, Codex and other agent accounts you already pay for. There's no Threadlines account to make. The code is MIT-licensed and began as a fork of T3 Code.

Download ThreadlinesView source
Runs on
macOS 13 or laterWindowsLinux
Price
Free
License
MIT